大大咧咧

大大咧咧

Literally means:

careless and casual

Actually means:

artery of transportation or communication

Careless and casual in getting along with people or dealing with things. It refers to someome who doesn't care much about matters harming his interests, nor does he care about the unpleasant results done by his words or deeds to other people.

指随随便便，满不在乎。形容做人比较随便，对不利于自己的事情不太注意，也不会考虑到自己的言行对别人会有什么副作用。